Cook the rotini pasta according to package directions until al dente. Toss with 2 teaspoons olive oil, salt, and pepper; set aside to cool.
In a medium bowl, mix sour cream, mayonnaise, 2 tablespoons olive oil, chili powder, garlic powder, cayenne pepper, lime zest, lime juice, salt, and pepper until smooth.
In a large bowl, combine cooled pasta, corn, Cotija cheese, and cilantro.
Pour most of the dressing over the pasta mixture and toss until well-coated.
Serve on a platter topped with remaining dressing and garnished with cilantro.